(S)-3-Formyl-8-oxo-7-(2-thiophen-2-yl-acetylamino)-5-thia-1-aza-bicyclo[4.2.0]oct-2-ene-2-carboxylic acid benzhydryl ester

(-)-(S)-1-Benzoyl-1-fluor-2,2-diphenylcyclopropan

2-diazo-1-(2,2-diphenylcyclopropyl)-1-ethanone

(-)-(S)-1-Fluor-2,2-diphenylcyclopropancarbonsaeure

3-[[[(4-nitrophenoxy)carbonyl]oxy]methyl]-8-oxo-7-[(2-thienylacetyl)amino]-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid diphenylmethyl ester